Effect of the Induced Molting with Wheat Bran on the Postmolt Performance of Laying Hens
2011
Hwangbo, J., National Institute of Animal Science, RDA, Seonghwan, Republic of Korea | Hong, E.C., National Institute of Animal Science, RDA, Seonghwan, Republic of Korea | Kang, B.S., National Institute of Animal Science, RDA, Seonghwan, Republic of Korea | Kim, H.K., National Institute of Animal Science, RDA, Seonghwan, Republic of Korea | Heo, K.N., National Institute of Animal Science, RDA, Seonghwan, Republic of Korea | Choo, H.J., National Institute of Animal Science, RDA, Seonghwan, Republic of Korea | Na, J.C., National Institute of Animal Science, RDA, Seonghwan, Republic of Korea | Choi, Y.H., Gyeongsang National University, Jinju, Republic of Korea | Kim, W., Milltech, Co., Ltd., Seongnam, Republic of Korea
This work was carried out to investigate the effect of the induced molting diet based on wheat bran on the postmolt performance of layers. Two hundred White Leghorn layers (65-old-wk) with over 80% egg production were used for 8 weeks in this work. Treatments were non-molt control (CO), fasting treatment for 10 days (FW), molt treatment with used molting diet for 4 wk (UM), molt treatment with molting diet based on corn-wheat bran for 4 wk (CW), and molt treatment with molting diet based on wheat bran for 4 wk (WM) as 5 treatments (4 replications/treatment and 10 birds/replication). Feed intake decreased at molting treatments at first weeks and increased after the 3rd week compared to control (P less than 0.05). Body weight (BW) loss were 18.6% of initial BW at first week in FW treatment, and were 11.4, 14.2 and 17.4% in UM, CW and WM treatments at 4th weeks (P less than 0.05). Egg production decreased at 1 week in molt treatment and stopped at 2 week in FW, whereas, other molting treatments didn't stop laying eggs. The birds started to lay egg at 4 week in FW and recovered at 5 week in other molting treatments. Egg quality (eggshell thickness, eggshell breaking strength, haugh unit) was high in molting treatments compared with control at 8th weeks (P less than 0.05). Finally, molting diet based on wheat bran affected BW loss and egg quality such as eggshell thickness, eggshell breaking strength and haugh unit.
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